Etymology
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blackout (n.)

also black-out, 1908 in the theatrical sense of a darkened stage, from the verbal phrase; see black (v.) + out (adv.). The figurative sense of "loss of memory" is by 1934 (verb and noun); as "a dousing of lights as an air raid precaution," it is recorded from 1935. The verbal phrase black out, in reference to using black ink to cover printed or written matter deemed objectionable, is attested from 1888.

updated on October 14, 2022

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